TextView实现跑马灯的效果；

用textview实现跑马灯的效果；

  <com.example.dialoge.MyTextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:singleLine="true"        android:focusable="true"        android:ellipsize="marquee"        android:focusableInTouchMode="true"        android:layout_height="wrap_content"        android:text="@string/hello_world" />

package com.example.dialoge;import android.content.Context;import android.util.AttributeSet;import android.view.ViewDebug.ExportedProperty;import android.widget.TextView;public class MyTextView extends TextView {    public MyTextView(Context context) {        super(context);        // TODO Auto-generated constructor stub    }    public MyTextView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        // TODO Auto-generated constructor stub    }    public MyTextView(Context context, AttributeSet attrs) {        super(context, attrs);        // TODO Auto-generated constructor stub    }    @Override    @ExportedProperty(category = "focus")    public boolean isFocused() {        // TODO Auto-generated method stub        return true;    }}